Perhaps you should try some spelling variations:
"complementarity constrained problem" » "complementar constrained problem" (Expand Search), "complementarity contained problem" (Expand Search), "complementarity constrained problemas" (Expand Search)
"complementaridade constraints problema" » "complementaridade constraints problemasa" (Expand Search), "complementaridade constraints problemas" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"complementarity constrained problem\") OR (\"complementaridade constraints problema\"))~".
• Removing quotes may allow a broader search: (( complementarity constrained problem ) OR ( complementaridade constraints problema ))~.
• Adding a wildcard symbol may retrieve word variants: (("complementarity constrained problem") OR ("complementaridade constraints problema"))*.